Follow that link and click on the "hes.net" tab on the far right (it's the last one). On hes.net, click on "DS" in the nav bar.
The first link is for Crystal Mines and it has some more information, including a link to the instructions:
http://www.hes.net/n...st=NDSCMS000960
http://www.crystalmines.com/
Finally, here is the developers page, with screenshots:
http://www.torus.com...age=games&id=69